Oil filter



June 8, 1954 G. R. BEARDSLEY 2,680,520

OIL FILTER Filed Feb. 1, 1951 2 Sheets-Sheet 1 FROM OIL PUMP TOLUBRICATED SURFACES H To ENGINE CRANKCASE m/yegg June 8, 1954 R.BEARDSLEY v OIL FILTER 2 Sheets-Sheet 2 Filed Feb. 1, 1951 1 eaifaisigyPatented June 8, 1954 OIL FILTER Gale R. Beardsley,

Fort Wayne, Ind, assignor to International Harvester Company, acorporation of New Jersey Application February 1, 1951,

Serial No. 208,901

6 Claims. (Cl. 210-164) cumbent for the engine operator to choose one ofthe methods for incorporation in his installation. Obviously, bychoosing one method over the other the operator sacrifices the desirablefeatures of the method not chosen.

The full flow delivered by the oil pump actually passes through thefilter unit since the filter media has a rather low oil permeability.

from the oil. It will be obvious that the partial flow filter unit,while capable of which passes the "full fiow filter unit, is notpractical to use in a full fiow system because of the huge filter unitthat would be needed to accommodate all the oil delivered by the pump.It is, therefore, the primary objective of the present invention toprovide a filter unit attachment applicable to a filter unit of the fullflow type whereby the desirable features of both the full flow andpartial flow systems are obtained without their inherent disadvantages.

Another object is to provide an auxiliary filter unit which is quicklyand easily attached to a modified full flow filter unit.

A further object is the provision of novel rericting means for directinga proportion of the oil introduced into the modified full flow filterunit to the filter unit attachment.

Still another object is the provision of unique attachment structure forassembling the auxiliary filter unit on the modified full flow unit.

The foregoing and other important objects and desirable featuresinherent in and encompassed by the invention, together with many of thepurposes and uses thereof, will become readily apparent from a readingof the ensuing description in conjunction with the annexed drawings, inwhich,

Fig. 1 is a longitudinal sectional view of a full unit before theapplication of the full flow filter unit.

Referring to the drawings in detail wherein like reference charactersrepresent like elements throughout the various views there is shown anwhich interconnects the pressure side of the pump and the threadedconnection 19 associated with the inlet passage.

The intermediate passage H has a central opening 20 disposed along thelongitudinal axis of the filter unit It. A pipe or passage (not shown)is secured to the sociated with the intermediate passage I? and tegrallyformed, radial flange 23 abuts a recessed annular surface 2 encirclingthe opening 29 to position the tubular member 22 within the body sectionii. A plurality of hollow disk-like filtering elements are spaced alongthe tubular member 2?. and are suitably secured thereto. Each disk-likeelement 25 is formed of screen material; the mesh size being sufficientto filter by straining the oil of relatively coarse particles withoutexcessive, damaging pressure values being experienced within the bodysection H. Periorations or apertures 26, provided along the length ofthe tubular member 22, establish fluid communication between theinterior or" each filter element 25 and the tubular member 22.

It will be readily seen that oil under pressure enters the inlet passagel6 and is directed to the interior of the body section H to fill thesame. The oil then passes through the screen disk-like elements 2'5 tothe interior or the tubular member 22 through the apertures 2%. Thefiltered oil then is directed to the intermediate passage 11 and thenceto the lubricated surfaces. The oil eventually returns to an oilreservoir (not shown) such as the engine crank case. It is to beunderstood that the mesh size of the filter elements 25 is to be smallenough to obstruct the passage of dirt, foreign matter, and metallicparticles of relatively large size which impair the lubricatingproperties of the oil but not so small as to prevent a substantiallyfree flow of oil through the filter unit. It will also be appreciatedthat the particular full flOW filter unit structure described isconventional in every respect oil passage it, the purposes of which willbe explained hereinafter.

Concentric with and being disposed within the perforated tubular member22 is an imperforate tubular member 2? which is supported by the endsection 2. The lower end 28 of the member 2'! extends into the lowermostpassage it. An inverted cup-shaped cover 29, having its outer peripheraledge 38 turned inwardly, is adapted to abut the gasket it to enclose thebody section H. The center of the cover has an aperture 3! fitted withan oil seal bushing 32 through which a spindle 33 extends. The lower endof the spindle 33 is provided with threads 35 for engaging correspondinginternal threads 35 formed in the tubular member 2?. A handle 35fastened to the spindle 33 exteriorly of the cover '29 is provided forscrewing the spindle into the tubular memher 2? to secure the cover tothe body section ii. In order to prevent seepage of oil from theinterior of the body section H to the tubular mere-- ber 22 withoutfirst passing through the filter elements 25 a seal is provided betweenthe spindle 33 and the tubular member 22. The upper end of the tubularmember 22 has a cap El secured thereto. The center of the cap 33 isdepressed forming an inverted conical pocket for receiving a rubbersealing ring 38 which is wedged between the cap 3? and the spindle 33. Acoil spring 38 encircling the spindle 33 having one end abutting thering 38 and its other end contacting the cover 29 maintains the ringwithin the annular pocket and further prevents the filter medium it frombeing displaced.

As stated hereinbeiore, while a full fiow type filter unit removes solidmatter or" a size sufficient to injure the bearings it is oftentimesdesirable to strain out the colloidal solids and to preserve the colorof the oil without the need of making costly alterations to the oilcleaning system.

with the exception of the provision of cored upon a radial The presentinvention contemplates the application of a compact, inexpensiveauxiliary filter unit attachment to a modified full fiow filter unit ofthe type described above in order to remove the nnpalpable impuritiesand metal damaging acids from the oil and still not sacrifice thebeneficial filtering characteristics of a conventional full flow filterunit.

The auxiliary filter unit attachment, designated generally by numeral llincludes a cylindrical shell ll having an inside diameter substantiallythe same as the outside diameter of the body section ll of the modifiedfull flow filter unit it. In order to modify the full flow" filteringsystem so it functions concurrently as a partial fiow filtering systemas well, the cover are removed from 29 together with the spindle 355 thefilter unit It. A lower portion d7. of the shell ll is telescoped overthe upper portion id of the body section i l. A circular plate 53,spaced from the lower edge it of the shell ti, is rigidly eecured to theshell ll and is adapted to abut the gasket Hi. The plate L? is providedwith a contrally disposed aperture which is efined by a circular,depending flange is integrally formed with the plate. The is radiallyspaced from the cap 3'! in order to provide an annular passage ll forthe fiow of oil from the filter unit i-il to the auxiliary filter unitattachment All.

The filter medium Q5 employed in the filter unit attachment ii? includesa pair of longitudinally spaced end flanges 5t and a tubular spindle iiihaving perforations or apertures disposed along the length thereof.Attached to each end fiange 9, is an annular seal retainer- 5'2, 53 forsupporting rings of sea as material such as felt or the like. Thetubular spindle is adapted to extend through the end flanges 50 and therings as and have its lower end 55 engageable with the internal threads35 formed the tubular member 21. The spindle I i extends upwardly beyondthe top flange 5d through a cover 56. The cover Eli has a peripheralflange 5'! adapted to abut a sealing gasket 55 supported shoulderintegrally formed with The outer end of the spindle 5i is provided witha handle 5% for screwing the spindle 5i into the tubular member 23 andthus securely mount the auxiliary filter unit it on the filter unit it.

The "partial fiow filter element til includes relatively fine meshscreen iii coated with a layer 62 comprising fibrous material or likesubstances. The screen $5 is spiraled about the spindle 5i to formsuperimposed layers of filtering media and is fastened to the flanges t3and 5:8 by any suitable means. The lower seal retainer 52 abuts theinclined surface of the cap 3? and prevents oil from entering thetubular member 22 from the shell ii. A coil spring 52, compressedbetween the upper seal retainer 53 and the cover 5%, maintains the lowerseal retainer 52 tightly against the cap Bl. While a particular type ofpartial fiow filter medium has been described, it is to be understoodthat the shell 3 i the invention is not limited to the employment or"that specific filter medium.

From the foregoing description, it will be appreciated that in order toincorporate the auxiliary filter unit attach cent lt into the oil systemand to thus convert what is normally a full flow oil filtration systemto a modified system having the advantages of both the full flow andpartial flow systems without the necessity of costly alterations, thefollowing steps are taken Handle 39 is turned in a direction to unscrewspindle 33 from tubular member 21. The cover 29 and spindle 33 are thenremoved from the body section H. Thereafter, the auxiliary filter unitattachment 40 is mounted on the flow. The oil which enters the shell Hseeps through the partial flow filter medium 28 in a transversedirection until it flows through apertures 45. The filtered oil thenflows downwardly through tubular spindle 5| and. tubular member 27 tooutlet passage 48. A pipe (not interconnects passage 18 with the oil oilwhich is restricted flOi l enterin the shell ll is filtered through thefull fiow filter elements 25 and enters tubular member 22 where it isdirected to the outlet passage 5?. As stated hereinbefore, the oil frompassage l! flows to the lubricated surfaces and eventually returns tothe oil reser- V011.

The embodiment oi the invention chosen for the purposes of illustrationand description herein is that preferred for achievn g the objects ofthe claizns.

What is claimed is: 1. A filter having an auxiliary filtering elementdisposed therein; attachment means for fastening one end said said firstconduit means.

4. A filter unit attachment as set forth in claim 3 in which, saidhousing is provided with restricting means for proportion of the fluidintroduced into said casing to said housing,

connecting said housing to said casing, said means including aperforated tubul 1 References Cited in the file of this patent UNITEDSTATES PATENTS Number Name Date 1,906,417 Renfrew et al. May 2, 19331,941,311 McLean Dec. 26, 1933 2,076,935 Burckhalter Apr. 13, 19372,271,054 Williams Jan. 27, 1942 2,313,307 Wilkinson Mar. 9, 1943

